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Issue 2780433005: Convert AudioParam tests to new Audit (Closed)
Patch Set: Address review comments Created 3 years, 8 months ago
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1 <!doctype html> 1 <!doctype html>
2 <html> 2 <html>
3 <head> 3 <head>
4 <title>Test setTargetAtTime Approach to Limit</title> 4 <title>Test setTargetAtTime Approach to Limit</title>
5 <script src="../../resources/testharness.js"></script> 5 <script src="../../resources/testharness.js"></script>
6 <script src="../../resources/testharnessreport.js"></script> 6 <script src="../../resources/testharnessreport.js"></script>
7 <script src="../resources/audit-util.js"></script> 7 <script src="../resources/audit-util.js"></script>
8 <script src="../resources/audio-testing.js"></script> 8 <script src="../resources/audit.js"></script>
9 <script src="../resources/audioparam-testing.js"></script> 9 <script src="../resources/audioparam-testing.js"></script>
10 </head> 10 </head>
11 11
12 <body> 12 <body>
13 <script> 13 <script>
14 14
15 var audit = Audit.createTaskRunner(); 15 var audit = Audit.createTaskRunner();
16 16
17 audit.defineTask("approach 1", function(done) { 17 audit.define("approach 1", (task, should) => {
18 var sampleRate = 48000; 18 var sampleRate = 48000;
19 19
20 // A really short time constant so that setTargetAtTime approaches the l imiting value well 20 // A really short time constant so that setTargetAtTime approaches the l imiting value well
21 // before the end of the test. 21 // before the end of the test.
22 var timeConstant = 0.001; 22 var timeConstant = 0.001;
23 23
24 // Find the time where setTargetAtTime is close enough to the limit. Si nce we're 24 // Find the time where setTargetAtTime is close enough to the limit. Si nce we're
25 // approaching 1, use a value of eps smaller than kSetTargetThreshold (5 e-7) in 25 // approaching 1, use a value of eps smaller than kSetTargetThreshold (5 e-7) in
26 // AudioParamTimeline.cpp. This is to account for round-off in the actu al implementation 26 // AudioParamTimeline.cpp. This is to account for round-off in the actu al implementation
27 // (which uses a filter and not the formula.) 27 // (which uses a filter and not the formula.)
28 var limitThreshold = 1e-7; 28 var limitThreshold = 1e-7;
29 29
30 runTest({ 30 runTest(should, {
31 sampleRate: sampleRate, 31 sampleRate: sampleRate,
32 v0: 0, 32 v0: 0,
33 v1: 1, 33 v1: 1,
34 timeConstant: timeConstant, 34 timeConstant: timeConstant,
35 eps: limitThreshold, 35 eps: limitThreshold,
36 // Experimentally determined 36 // Experimentally determined
37 threshold: 2.4e-5 37 threshold: 2.4e-5
38 }).then(done); 38 }).then(() => task.done());
39 }) 39 })
40 40
41 audit.defineTask("approach 0", function(done) { 41 audit.define("approach 0", (task, should) => {
42 // Use the equation for setTargetAtTime to figure out when we are close to 0: 42 // Use the equation for setTargetAtTime to figure out when we are close to 0:
43 // 43 //
44 // v(t) = exp(-t/tau) 44 // v(t) = exp(-t/tau)
45 // 45 //
46 // So find t such that exp(-t/tau) <= eps. Thus t >= - tau * log(eps). 46 // So find t such that exp(-t/tau) <= eps. Thus t >= - tau * log(eps).
47 // 47 //
48 // For eps, use 1e-20 (kSetTargetZeroThreshold in AudioParamTimeline.cpp ). 48 // For eps, use 1e-20 (kSetTargetZeroThreshold in AudioParamTimeline.cpp ).
49 49
50 var sampleRate = 48000; 50 var sampleRate = 48000;
51 51
52 // A really short time constant so that setTargetAtTime approaches the l imiting value well 52 // A really short time constant so that setTargetAtTime approaches the l imiting value well
53 // before the end of the test. 53 // before the end of the test.
54 var timeConstant = 0.001; 54 var timeConstant = 0.001;
55 55
56 // Find the time where setTargetAtTime is close enough to the limit. Si nce we're 56 // Find the time where setTargetAtTime is close enough to the limit. Si nce we're
57 // approaching 0, use a value of eps smaller than kSetTargetZeroThreshol d (1e-20) in 57 // approaching 0, use a value of eps smaller than kSetTargetZeroThreshol d (1e-20) in
58 // AudioParamTimeline.cpp. This is to account for round-off in the actu al implementation 58 // AudioParamTimeline.cpp. This is to account for round-off in the actu al implementation
59 // (which uses a filter and not the formula.) 59 // (which uses a filter and not the formula.)
60 var limitThreshold = 1e-21; 60 var limitThreshold = 1e-21;
61 61
62 runTest({ 62 runTest(should, {
63 sampleRate: sampleRate, 63 sampleRate: sampleRate,
64 v0: 1, 64 v0: 1,
65 v1: 0, 65 v1: 0,
66 timeConstant: timeConstant, 66 timeConstant: timeConstant,
67 eps: limitThreshold, 67 eps: limitThreshold,
68 // Experimentally determined 68 // Experimentally determined
69 threshold: 1.3e-7 69 threshold: 1.3e-7
70 }).then(done); 70 }).then(() => task.done());
71 }); 71 });
72 72
73 function findLimitTime(v0, v1, timeConstant, eps) { 73 function findLimitTime(v0, v1, timeConstant, eps) {
74 // Find the time at which the setTargetAtTime is close enough to the tar get value |v1| where 74 // Find the time at which the setTargetAtTime is close enough to the tar get value |v1| where
75 // we can consider the curve to have reached its limiting value. 75 // we can consider the curve to have reached its limiting value.
76 // 76 //
77 // If v1 = 0, |eps| is the absolute error between the actual value and 77 // If v1 = 0, |eps| is the absolute error between the actual value and
78 // |v1|. Otherwise, |eps| is the relative error between the actual valu e and |v1|. 78 // |v1|. Otherwise, |eps| is the relative error between the actual valu e and |v1|.
79 // 79 //
80 // The curve is 80 // The curve is
(...skipping 11 matching lines...) Expand all
92 // For v1 not zero, we want |v(t) - v1|/|v1| <= eps: 92 // For v1 not zero, we want |v(t) - v1|/|v1| <= eps:
93 // 93 //
94 // t >= timeConstant * log(abs(v1-v0)/eps/v1) 94 // t >= timeConstant * log(abs(v1-v0)/eps/v1)
95 95
96 if (v1) 96 if (v1)
97 return timeConstant * Math.log(Math.abs(v1-v0)/eps/v1); 97 return timeConstant * Math.log(Math.abs(v1-v0)/eps/v1);
98 else 98 else
99 return timeConstant * Math.log(v0/eps); 99 return timeConstant * Math.log(v0/eps);
100 } 100 }
101 101
102 function runTest(options) { 102 function runTest(should, options) {
103 var renderLength = 1; 103 var renderLength = 1;
104 104
105 var context = new OfflineAudioContext(1, renderLength * sampleRate, opti ons.sampleRate); 105 var context = new OfflineAudioContext(1, renderLength * sampleRate, opti ons.sampleRate);
106 106
107 // A constant source 107 // A constant source
108 var source = context.createBufferSource(); 108 var source = context.createBufferSource();
109 source.buffer = createConstantBuffer(context, 1, 1); 109 source.buffer = createConstantBuffer(context, 1, 1);
110 source.loop = true; 110 source.loop = true;
111 111
112 var gain = context.createGain(); 112 var gain = context.createGain();
(...skipping 11 matching lines...) Expand all
124 options.v0, options.v1, 124 options.v0, options.v1,
125 options.sampleRate, options.timeConstant); 125 options.sampleRate, options.timeConstant);
126 126
127 var message = "setTargetAtTime(" + options.v1 + ", 0, " + options.time Constant + ")"; 127 var message = "setTargetAtTime(" + options.v1 + ", 0, " + options.time Constant + ")";
128 128
129 // Determine where the tail of the curve begins. (Where the curve has basically reached 129 // Determine where the tail of the curve begins. (Where the curve has basically reached
130 // the limit value.) 130 // the limit value.)
131 var tailTime = findLimitTime(options.v0, options.v1, options.timeConst ant, options.eps); 131 var tailTime = findLimitTime(options.v0, options.v1, options.timeConst ant, options.eps);
132 var tailFrame = Math.ceil(tailTime * options.sampleRate); 132 var tailFrame = Math.ceil(tailTime * options.sampleRate);
133 133
134 var success = true; 134 should(actual.slice(0, tailFrame),
135 success = Should("Initial output of " + tailFrame + " samples for " + message, 135 "Initial output of " + tailFrame + " samples for " + message)
136 actual.slice(0, tailFrame), { numberOfArrayLog: 8 }) 136 .beCloseToArray(expected.slice(0, tailFrame), {
137 .beCloseToArray(expected.slice(0, tailFrame), options.threshold) && success; 137 absoluteThreshold: options.threshold
138 });
138 139
139 success = Should("Tail output for " + message, 140 should(actual.slice(tailFrame), "Tail output for " + message)
140 actual.slice(tailFrame)) 141 .containValues([options.v1]);
141 .containValues([options.v1]) && success;
142
143 Should(message, success)
144 .summarize("had the expected values",
145 "did not have the expected values");
146 }); 142 });
147 } 143 }
148 144
149 audit.defineTask("finish", function (done) { 145 audit.run();
150 done();
151 });
152
153 audit.runTasks();
154 </script> 146 </script>
155 </body> 147 </body>
156 </html> 148 </html>
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